Calculator



FIG. 1 shows a top view of my claimed design;

FIG. 2 shows a bottom view of my claimed design;

FIG. 3 shows a right side view of my claimed design;

FIG. 4 shows a left side view of my claimed design;

FIG. 5 shows a front view of my claimed design;

FIG. 6 shows a rear view of my claimed design; and,

FIG. 7 shows a front, right perspective view of my claimed design, thedisplay shown in an up position.

The ornamental design for a calculator, as shown and described.